[IGSMAIL-6965] igs08_1808.atx: Update including reactivated Block IIA satellite SVN35/PRN03

[Ralf Schmid]

Dear IGS colleagues!

The absolute IGS antenna correction file (igs08_wwww.atx) has been 
updated. The new release is called 'igs08_1808.atx'. It contains the 
following changes:

1) According to NANU 2014069, Block IIA satellite SVN35 resumes 
transmitting L-band utilizing PRN03 on approximately 5 September 2014. 
Therefore, the following satellite has been added to igs08.atx:

G03 (G035)

Source:
> NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2014069 NANU TYPE: GENERAL
> *** GENERAL MESSAGE TO ALL GPS USERS ***
> ON APPROXIMATELY 05 SEP 2014 SVN35 WILL RESUME TRANSMITTING L-BAND UTILIZING PRN03. AT L-BAND ACTIVATION, SVN35/PRN03 WILL BE UNUSABLE UNTIL FURTHER NOTICE. ADDITIONALLY, NO BROADCAST ALMANACS WILL INCLUDE SVN35/PRN03 UNTIL FURTHER NOTICE.
http://www.navcen.uscg.gov/?Do=gpsShowNanu&num=2014069

2) A decommission date for the following satellite has been added:

G03 (G033): 18 August 2014

Although officially removed from the GPS constellation on 2 August 2014 
(see NANU 2014063), SVN33 didn't stop signal transmission before 18 
August 2014 according to the IGS tracking statistics provided by CODE 
(ftp://ftp.unibe.ch/aiub/igsdata/odata_gnss_day.txt).


The updated antenna correction model is available at
ftp://ftp.igs.org/pub/station/general/igs08_1808.atx
or
ftp://ftp.igs.org/pub/station/general/igs08.atx
Please be aware that the latter link changed!

Thanks to Richard Langley for his help!

With best regards,
Ralf Schmid
on behalf of the IGS Antenna Working Group